Cutter-head for wood-working machines



(No Model.)

. T. FITZSIMMONS.

CUTTER HEAD FOR WOOD WORKING MACHINES. No. 253,273. Patented Feb.7,1882.

UNITED STATES PATENT OFFICE.

THOMAS FITZSIMMONS, OF BURLINGTON, VERMONT.

CUTTER-HEAD FOR WOOD-WORKING MACHINES.

SPECIFICATION forming part of Letters Patent No. 253,273, dated February7, 1882.

Application filed November 10, 1881.

To all whom it may concern Beit known that I, THoMAs FITZSIMMONS, acitizen oftheUnitedStatesofAmerica,residing at Burlington, in the countyof Ohittenden and State of Vermont, have invented certain new and usefulImprovementsin Cutters and Plates for Planing and Molding Machines; andI do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to letters or figures of referencemarked thereon,which form a part of this specification.

My invention relates to improvements in cutter heads and plates forplaning and molding machines; and the objects ofmyimprovements are,first, to provide a device by which the cutter may be readily attachedto the cylinder without a possibilty of displacement in the act ofsetting the same; second, to so arrange its attachment to the cylinderthat'it cannot yield to any obstruction which may arise in itsoperation; and, third, to afford facilities for keeping the cutter inline and clearing the groove ate the side of the head, thereby leavingthe bead always of a uniform size, and avoiding any liability of heatingthe cutters, and thus drawingtheir temper. I atlain theseobjectsbythemechanisin illustrated in the accompanying drawings, in which- Figurel is a perspective view ofa side cutter blade and plate attached to thecylinder. Fig. 2 is a detailed view, in perspective, of a side cutterblade and plate. Figs. 3and4aresimilar views of a center cutterandplatein detail.

Similar letters indicate like parts throughout the several views.

A is a side cutter-blade, slotted at a, as is customary, to receive thebolt E, by which it and its plate B are rigidly attached to the usualslotted square cylinder, G. Alongthe entire length of its lower face andparallel with the cutting-edge projects a lip, which is a continuationof the interior knife of the cutter-head, and is designed to fit into acorresponding groove inthe upper face oftheplate B, so that when inposition the exterior edges of the cutter blade and plate shallcorrespond. The plate B is of the same length, as well as width, of

(No model.)

the cutter-blade A. On its under face is a transverse projection, 12, ofa width sufficient to closely fit into the upper part of the slot H ofthe cylinder G. The two plates A and B are held together by a bolt, E,whose head is designed to fit into the lower and elongated portion ofthe slot H of the cylinder G. A nut, F, and washer serve to attach themrigidly to each other and to the cylinder G after the cutter is slidforward to its desired projection beyond the edge of the cylinder. Thecenter cutter, O, and its plateD are of similar form as the side cutter,A, and its plate B, except that an additional lip projects from theunder face of the cutter-blade, being the continuation of the line ofthe outside knife, and an additional corresponding groove near theoutside edge of the upper face of the plate D. To better brace andsupport the cutters they are made to project beyond the full width ofthe plates Aand 0 only that distance which is absolutely essential totheir practical operation.

In operation the head of the bolt E is slid into the slot H of thecylinder G. The boltis then passed through a hole in the plates B or D,which brings their respective projections, 11 or d, into the upper partof the slotH. The cutters A or O are then placed upon their respectiveplates, B or D, their lips sliding into their corresponding grooves.Then by screwing down the nut F and washer of the bolt E, which passesthrough the slot a or c of the cutters, both the blades and theirrespective plates become easily and rigidly attached to the cylinder G.To set the cutter no care is required to prevent its being turned ormoved out of line on the cylinder, as would be necessary if it weredirectly attached to the cylinder in the ordinary manner, asits lip orlips, moving in the fixed grooves, a plate which is always kept in placeby the projection on its under surface, retain it absolutely in place.For the same reason it cannot be displaced by any obstruction it maymeet with in its working-a liability to which it is often subject whenit is only held by the bolt. Agreat advantage also is found inthepresence of the lip,which continually clears the groove of any fuzz orshavings along the side of the blade.

This leaves the bead always of the same uniform size, keeps the cuttersof the same shape, and efl'ectually prevents their heating. The resultisthat by means of my improvements not only much time and labor are savedin setting the cutters, but also the work performed is of a more perfectand satisfactory character.

Having fully describedmy invention, what I claim as new, and desire tosecure by Letters Patent, is

1. The combination of the grooved cutter, with a plate,B, havingaprojection on its inner side to catch in the slot, a clamping-bolt, anda cutter-head, substantially as shown.

ter havinga bead or beads on its inner surface,v

substantially as described.

In testimony whereofI atfix my signature in presence of two witnesses.

THOMAS FITZSIMMONS.

Vitnesses CHARLES E. ALLEN, ALBERT N. PERCY.

